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Melbourne (ANI): Popstar Britney Spears has said that she repents her past chaotic years, insisting that she's shocked to realize what was she thinking all these years. The "Hit Me Baby One More Time" hitmaker has a tough time in the past when she had a public meltdown, custody battle of her kids and a terrible MTV award performance.

"I sit there and I look back and I'm like, "I'm a smart person. What the hell was I thinking?" News.com.au quoted Spears, as telling People.com. "I've been through a lot in the past two or three years, and there's a lot that people don't know," she added.

Britney, who has had an image makeover and is again trying to carve a niche in the music industry, stated that as a popstar she was always guarded, which led to loneliness.

"Sometimes I think I get kind of lonely because you don't open the gate up that much, you know I mean?" she said. "You're guarded. You have to be that way, so I'm kind of stuck in this place and it's like: How do you deal? And you just cope, and that's what I do. I just cope with it, every day," she added.